Machine for removing the bark from logs.



K. A. STZHLNACKE.

MACHINE FOR REMOVING THE BARK FROM LOGS.

APPLICATION FILED FEB-6.1915.

1,178,61 5. Patented Feb. 29, 1916. o/b

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MACHINE FOR REMOVING THE BARK FROM LOGS.

APPLICATION FILED FEB. s. 1915.

Patented Feb. 29, 1916.

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MACHINE FOR REMOVING THE BARK FROM LOGS.

APPLICATION FILED FEB. 6, 1915.

1,173,61 5. Patented Feb. 29, 1916.

3 SHEETISSHEET 3.

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KARL ARTHUR sTAHLNAcKE, OF osTuRAs, BERGVIK, SWEDEN.

MACHINE FOR REMOVING THE BARK FROM LOGS.

Application filed February 6', 1915.

To all '10]! 0111 it m (13/ concern Be it known that I, KARI. ARTHURSTZHL- NACKE, a subject of the King of Sweden, and resident of lsteras,Bergvik, in the Kingdom of Sweden, have invented certain new and usefulImprovements in Machines for Removing the Bark from Logs, of which thefollowing is a specification, reference being had therein to theaccompanylng drawings.

This invention relates to a machine for removing the bark from logs andthe like.

The invention refers especially to a slmple and practical device forrotating the log and simultaneously feeding it forward, the said devicein its most suitable form being so fitted that the feeding forward ofthe log is changed automatically according as the diameter of the logvarles.

The invention refers also to some devices cooperating with the devicesstated above and which will be described more particularly hereinafter.

The annexed drawings show the machine in Figure 1 from the side, in Fig.2 1n cross section and in Fig. 3 in plan view, partly 1n section. Fig. 4shows a longitudinal section of a drive clutch for the shaft of thebarking disk. Figs. 5 and 6 show details belonging to the path of thelog. Fig. 7 shows in detail the device keeping the log in movement. Fig.8 shows a clutch. Fig. 9 shows parts cooperating with said clutch.

In the machine shown in Figs. 1 and 2, a plurality of barking disks 1,'1, are arranged at the same distance from each other along the log. Thebarking disks are journaled so that their shafts 2 which are horizontalor substantially horizontal form a right or substantially right anglewith the log, the bellied side provided with knives 1 being in contactwith the log. Moreover the position of height of the disk relatively tothe bed for the log is adapted in such a manner that the contact pointbetween the disk and the log will lie higher than the shaft of the disk.Motion is transmitted to the disks 1 by a chain or'other suitable gear.4 designates their driving pinions and 5 the driving shaft, from whichthe power is transmitted to the said disks. The shafts of the disksconsist of several parts or are provided with a clutch 3, so-

that the same can expand in the longitudinal direction, said shaftsbeing acted upon by the spring 42 through the lever 41, Fig.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Serial No. 6,529.

2, so that the disk 1 is held against the log in a yielding manner.

Fig. 4 shows the said clutch in detail. The shaft 2 can slide in thelongitudinal direction in the shell 50 supported by suitable bearings,the driving pinion 4 being secured on said shell. The piston 40, withwhich the lever 41 is connected can also move in said shell. The lever41 is acted upon by a spring 42 which is connected with the same bymeans of a clamp 44 or the like fixed to the lever 41 in an adjustablemanner. The other end of the spring 42 is by means of anotherdisplaceable clamp 41 secured to the bar 43 being parallel to theshaft-2. Between the parts 2 and 40 there is located a spring 51. Theshell 50 is provided with longitudinal grooves 52, in which rollers 53run, which are located on the lateral pivots 54 of the shaft 2. Theshaft 2 is thereby caused to partake in the rotation of the shell 50 andthe shaft can besides move in the longitudinal direction. The axialpressure of the barking disks against the log can be regulated bydisplacement of the clamps 41 44*.

The path for the log consists of the two rollers 13, 13 (or of more suchrollers). The roller 13 is journaled on the one end of a lever 13located at right angles to the log and ournaled horizontally in suitablebearings 14. A disengageable ratchet device mamtains the levers in ahorizontal position for supporting the log. If the ratchet device 1sdisengaged the ends of the levers carrying the log will swing downwardwhereby this latter falls down. The levers then occupy their originalposition and the next log can be rolled from the table 48 on to thesame. The ratchet device, which can be of any suitable form is soarranged that it works automatically. A hook or the like grasps,according to the drawing, over the rear end of the lever, said hookbeing arranged as a lever and is on the drawing designated by 15. 1.4designates the hook itself. The lower ends of the two levers 15 areconnected through a link 16. Moreover, one of them is by-means of aspring or the like 22 connected to a lever arm 45, arranged as apendulum, the weight 46 being adjustably secured to the same, the otherlever 15 being by means of a spring 21 or the like connected to an arm20 of a hollow shaft 19 provided with another arm 18 located in the pathof the log. When the log moving in the direction against the arm 18, isfree from bark the same will abut against the arm .18, therebydisengaging the ratchet device, so that the lovers 15 Will be free andthe log fall down. The hooks are then returned to their operativeposition by the weight 46 and the levers 15 are again brought intoengagement with the hooks by the counter-\mights 15 on the rear ends ofthe levers 13*. The rollers 17 receive the barked log, when this latteris delivered from the rollers 13, and transport the same further.

In order to impart movement to the log there is an arm (3 or the likeforming an angle with the log and movable up and down and also to theside longitudinally of the log, said arm being provided with a toothedfeed roller 7 or the like, by means of which the same rests against thelog. The roller 7 is caused to rotate by means of the gears 56, 57, 58to which motion is imparted from the shaft 12 (Fig. 7 The arm 6 isprovided with weights 8. A rope 10 passes upward'from the arm 6 and iswound around a disk 11 forming the one part of a friction clutch 1111 onthe shaft 12 from which the arm 6 projects. If the said clutch is thrownon, the rope will be wound upon the drum and the arm 6 be raised. Thelatter is guided by the inclined guide 9. The arm 6 has such a.position, that the feed roller 7 inclines to the log as shown in Figs.1 and 3, whereby the log will be moved longitudinally and at the sametime be rotated, the roller 7 moving along a screw thread line on thesame. As on account of the inclination of the guide 9 the angularposition-of the arm to the log is varied by the raising or lowering ofthe arm, determined by the diameter of the log, the pitch of the saidscrew line will be varied by the said movement. A slender log willthereby get a more rapid longitudinal movement than a thicker..one. Theraising and lowering of the arm 6 also takes place automatically. Alever 30 is combined with the friction clutch 1111" and is by means of aspring 31 connected to the arm 24 secured on a shaft 23 extendingthrough the shaft 19. Another arm 25 secured on the shaft 23 is providedwith a weight 27 and with a, shoulder 28 acting against lever 30. Thereis also on'the shaft 23 an arm 29, lying in the path of the arm 18 actedupon by the log, so that the arm 29 will be moved by the arm 18. Thefrietion clutch is provided with a ratchet wheel 36 (Fig. 9) againstwhich rests a pawl provided on a lever arm 37 supporting a weight 38.The lever arm 37 is by means of a spring 39 connected to a lever 34 on ashaft 32, provided with another lever arm 33 extending into the path ofthe log in order that it may be acted upon,

when the log is rolled on to the rollers 13. The lever 34 is alsobrought to turn by the said movement, thereby raising the ratchet of thearm 37 from the ratchet wheel 36. Then, the feed arm 6 falls downagainst the log along the guide 9 and forces the log against the barkingdisks 1, the log thereby receiving its above mentioned rotating and"longitudinal movement. When the fore end of the log reaches the leverarm 18 and swings the same this latter takes the lever arm 29 andthereby the lever arms 24:, 25 with it. The lever arms 24, 25 will nowbe swung toward the right, Fig. 1, so that the shoulder 28 releases thelever 30 and the arm 24 acting through the spring 31 brings the frictionclutch 11, 11*, into operative position, the rope 10 being thus Wound upand the feed arm6 raised. When the log has fallen from the roller 13 thelever30 again occupies its former position by the action of the counterweight 27 and the clutch 1111 is thrown off. The feed arm 6 remains inits raised position on account of the engagement of the lever 37 withthe ratchet wheel 36. When the next log arrives onto the roller 13 thesame will actuate the lever 33, the clutch part 11 will be free and thefeed arm 6 falls down as above mentioned.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a barking machine, the combination of an arm capable of swinginglongitudinally of the log, a toothed roller carried by the said arm andforced against the log for rotating and feeding the same, means forrotating the said roller, and means for bringing the said arm intodifferent oblique positions with relation to the log, substantially asdescribed and for the purpose set forth.

2. In a barking machine, the combination of an arm capable of swinginglongitudinally and transversely of the log, a toothed roller carried bythe said arm and forced against the log for'rotating and feeding thesame, means for rotating the said roller, and an oblique guide for thesaid arm for changing the oblique position of the arm and the rollerwith relation to the log and thus the feed velocity in accordance withthe diameter of the log, substantially as described.

3. In a barking machine, the combination of an arm capable of swinginglongitudinally and transversely of the log, a toothed roller carried bythe saidarm and forced against the log for rotating and feeding thesame, means for rotating the said roller, means for bringing the saidarm and the roller into different oblique positions with relation to thelog so that the feed velocity is changed in accordance with the diameterof the log, a rope connected with the said arm, a driving shaft, afriction clutch eooperating with the said shaft, one of the members ofthe said clutch consisting ofa drum around which the-said rope is woundfor raising the arm, a catching device keeping the arm in raisedposition, even if, after the raising of the arm, the said clutch isdisengaged, and meansacted upon by the log when brought intothe'position to be barked for disengaging the said catching device. g

4. In a barkin machine, the combination of an arm capa le of swinginglongitudinally and transversely of the log, a toothed roller carried bythe said arm' and forced against the log for rotating and feeding thesame, nieans for rotating the said roller, means for bringing the saidarm and the roller into different oblique positions with relation to thelog so that the feed velocity is changed in accordance with the diameterof the'log, a rope connected with the said arm, a driving shaft, afriction clutch cooperating with the said shaft, one of the members ofthe said clutch consisting of a drum around which the said rope is woundfor raising the arm, means for bringing the clutch into operativeposition, a lever arm acted upon by a Weight and normally keeping theclutch in disengaged position, and an arm which is located in the pathof the log and when acted upon by the same, brings the said lever arminto inoperative position so that the clutch is engaged and the armcarrying the feed roller is raised.

5. In a barking machine, the combination of an arm capable of swinginglongitudinally and transversely of the log, a toothed roller earned bythe said arm and forced against the log for rotating and feeding thesame, means for rotating the said roller,

means for bringing the said arm and the roller into different obliquepositions with relation to the log so that the feed velocity is changedin accordance with the diameterof the log, supports for the log capableof swinging, means locking the said supports in operative positlon,means acted upon by the barked log and disengaging the said of an armcapa 1c of swinging longitudinally and transversely of the log, atoothed roller carried by the said arm and forced against the log forrotating and feeding the same, means for rotating the said roller, meansfor bringing the said arm and the roller into different obliquepositions with relation to the log so that the feed velocity is changedin accordance with the diameter of the log, supporting rollers for thelog carried by levers, hook-shaped levers engaging the said rollercarrying levers, an arm located in the path of the log, means connectinthe said arm with the said hookshape levers so that the said arm, whenacted upon by the log, disengages the hookshaped levers, and meansreturnmg the roller carrying levers and the hook shaped levers in theiroperating positions after the log has left the roller carrying levers.

In Witness whereof, I have hereunto signed my name in presence of twosubscribing witnesses.

KARL ARTHUR STAHLNACKE.

Witnesses:

FRANK E. LYON, ELIN WAHMAN.

